Pew Research Center designed this study to assess the current state of online survey sampling methods – both probability-based and opt-in – and determine their accuracy on general population estimates ...

We may receive commissions from some links to products on this page. Promotions are subject to availability and retailer terms. Vice President of Growth & Engagement at CBS News and Stations Jennifer ...

Probability-based panel: This refers to a national survey panel recruited using random sampling from a database that includes most people in the population. Today, most such panels in the United ...